As of right now neither Hammer of Justice, Fist of Justice, or Repentance benefit from passive hit bonuses such as Holy Insight. For the sake of PvP I believe it would be necessary to add these abilities to Holy Insight. I'm really not sure if this was intended by design or not but it would be beautiful to not have to put +hit gems in gear for these abilities. Thanks!

Edit: Blinding Light and Turn Evil could use the same treatment, as well as the last talent tier abilities although those aren't as game breaking.